to concentrate
Regular verb: concentrate - concentrated- concentrated

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 do I not concentrate?
do you not concentrate?
doeshe not concentrate?
do we not concentrate?
do you not concentrate?
do they not concentrate? 	amI not concentrating?
areyou not concentrating?
ishe not concentrating?
arewe not concentrating?
areyou not concentrating?
arethey not concentrating? 	did I not concentrate?
did you not concentrate?
did he not concentrate?
did we not concentrate?
did you not concentrate?
did they not concentrate? 	wasI not concentrating?
wereyou not concentrating?
washe not concentrating?
werewe not concentrating?
wereyou not concentrating?
werethey not concentrating? 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
 have I not concentrated?
have you not concentrated?
hashe not concentrated?
have we not concentrated?
have you not concentrated?
have they not concentrated? 	 have I not been concentrating?
have you not been concentrating?
hashe not been concentrating?
have we not been concentrating?
have you not been concentrating?
have they not been concentrating? 	had I not concentrated?
had you not concentrated?
had he not concentrated?
had we not concentrated?
had you not concentrated?
had they not concentrated? 	had I not been concentrating?
had you not been concentrating?
had he not been concentrating?
had we not been concentrating?
had you not been concentrating?
had they not been concentrating? 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
will I not concentrate?
will you not concentrate?
will he not concentrate?
will we not concentrate?
will you not concentrate?
will they not concentrate? 	will I not be concentrating?
will you not be concentrating?
will he not be concentrating?
will we not be concentrating?
will you not be concentrating?
will they not be concentrating? 	will I not have concentrated?
will you not have concentrated?
will he not have concentrated?
will we not have concentrated?
will you not have concentrated?
will they not have concentrated? 	will I not have been concentrating?
will you not have been concentrating?
will he not have been concentrating?
will we not have been concentrating?
will you not have been concentrating?
will they not have been concentrating? 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
would I not concentrate?
would you not concentrate?
would he not concentrate?
would we not concentrate?
would you not concentrate?
would they not concentrate? 	would I not be concentrating?
would you not be concentrating?
would he not be concentrating?
would we not be concentrating?
would you not be concentrating?
would they not be concentrating? 	would I not have concentrated?
would you not have concentrated?
would he not have concentrated?
would we not have concentrated?
would you not have concentrated?
would they not have concentrated? 	would I not have been concentrating?
would you not have been concentrating?
would he not have been concentrating?
would we not have been concentrating?
would you not have been concentrating?
would they not have been concentrating? 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to concentrate 	 	-
-
- 	 	

Participle 	
Present 	Past 	 	 	
concentrating	concentrated